Bio Herador® SG – for C& B

Description:

High gold content ceramic bonding alloy acc. to EN ISO 9693-1 and 22674, yellow

BENEFITS:

Gold content 88.7 mass % (precious-metal content 98.4 mass%
Universal indication range, suitable for large bridges with more than two units upon installation of special framework strengthening.
Suitable for milling
Palladium and copper free
Contains only gold, platinum, and essential trace elements
Excellent corrosion resistance

SPECIFICATIONS:


Ceramic bonding alloy acc. to EN ISO 9693 EN ISO 22674
Type	4 (s/ v/ k)
Shade	Yellow
Indication	3,4,5,15A)
Composition	Au 88.7 Pt 9.49 Zn 1.5 Ir x Mn 0.1/ Rh 0.2


Technical specifications, melting and casting
Melting range	1055 ° – 1130 ° C
Preheating temperature	850 ° C
Casting temperature	1280 ° C
Crucible	Graphite
Density	19.0 g/cm3
Hardness (HV5)	215 (w/k), 220 (v), 180 (s)
0.2 % yield strength (MPa)	520 (w/k), 540 (v)
Elongation (%)	6 (w/k), 5 (v)
Young’s modulus of elasticity (GPa)	90


Ceramic firing
CTE	14.5
Oxide firing	880° C/ 10 min. (vacuum, stripping)
Soft annealing	—
Hardening	450° C/ 15 min.


Solder/laser welding wire
Solder	Herador PF solder 1040, 1010 Herador/Maingold PF solder 800
Laser welding wires	Ø 0.5 mm x 200 mm + Ø 0.3 mm x 200 mm

SPECIFICATION LEGEND

Explanation of abbreviations and numbering:

x = content < 0.1 mass%

Indications:

1 Inlays, cervical filling
2 MOD Inlays
3 Crowns
4 Bridges
5 Milling technique
6 Partial dentures
10 Cast posts
14 Can be veneered with high expansion, low-fusing ceramics
15 Implant restorations
16 Electroformed double crown technique (primary crowns)

Abbreviations:

w = after soft annealing and quenching
k = ceramic bonding alloy: condition after ceramic firing
v = after hardening
s = self-hardening after slow cooling in the mould

A = A stable framework design with reinforced connections with a cross section of 8 – 10 mm² is required for long span bridges and superstructures. Additionally, the frameworks need to be hardened.
B = Depending on the copper content, in some cases discolouration ofdouble crowns may result after short period of wearing. Discolouration, however, is technically and physiologically harmless.
C = In exceptional cases these alloys can also be used for traditional telescopic crowns with parallel walls and for the bar casting technique provided that cross-sections for crown walls, approximal areas, bars and laser welded joints are particularly thick and the alloy is hardened subsequently. No indication for conical crowns and sheardistributors.